Joule heating as a smart approach in enhancing early strength development of mineral-impregnated carbon-fibre composites (MCF) made with geopolymer

The article at hand presents a novel approach to accelerating the early strength development of mineral-impregnated carbon-fibre composites (MCF) by electrical Joule heating. MCF were produced with metakaolin-based geopolymer suspension and subsequently cured using Ohmic heating under systemically varied voltages durations. characterised in respect their mechanical morphological properties. Three-point-bending uniaxial tension tests yielded significant enhancement properties due curing within only few hours. Thermogravimetric analysis (TGA), mercury intrusion porosimetry (MIP), environmental scanning electron microscope (ESEM) as well micro-computed tomography (µCT) confirmed advanced geopolymerisation process strong sensitivity parameter selection. After two hours resistance could demonstrate tensile up 2800 MPa, showing great potential for applying effect possibility enhance geopolymer-based MCF. Moreover, applied method offers huge manufacture automated fast out-of-oven variety shapes dimensions.